Clostridium novyi

Definition: a bacterial species consisting of three types, A, B, and C; type A, from a case of gaseous gangrene and from human necrotic hepatitis, produces ?-toxin (a hemolytic lecithinase); B, from black leg disease (infectious necrotic hepatitis) of sheep, produces ß-toxin (a hemolytic lecithinase); and C, found in bacillary osteomyelitis of water buffaloes, does not produce toxin.